ALSA: hda/ca0132 - Avoid endless loop
commitcb04fc3b6b
upstream. Introduce a timeout to dspio_clear_response_queue() so that it won't be caught in an endless loop even if the hardware doesn't respond properly. Fixes:a73d511c48
("ALSA: hda/ca0132: Add unsol handler for DSP and jack detection") Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20191213085111.22855-3-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1809,13 +1809,14 @@ struct scp_msg {
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static void dspio_clear_response_queue(struct hda_codec *codec)
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{
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unsigned long timeout = jiffies + msecs_to_jiffies(1000);
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unsigned int dummy = 0;
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int status = -1;
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int status;
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/* clear all from the response queue */
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do {
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status = dspio_read(codec, &dummy);
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} while (status == 0);
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} while (status == 0 && time_before(jiffies, timeout));
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}
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static int dspio_get_response_data(struct hda_codec *codec)
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